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pinnate

[pin-eyt, -it]
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adjective
  1. resembling a feather, as in construction or arrangement; having parts arranged on each side of a common axis: a pinnate branch; pinnate trees.
  2. Botany. (of a leaf) having leaflets or primary divisions arranged on each side of a common stalk.
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Often pin·nat·ed [pin-ey-tid] /ˈpɪn eɪ tɪd/.

Origin of pinnate

First recorded in 1695–1705, pinnate is from the Latin word pinnātus feathered, winged. See pinna, -ate1
Related formspin·nate·ly, pin·nat·ed·ly, adverbmul·ti·pin·nate, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for pinnate

pinnate

pinnated

adjective
  1. like a feather in appearance
  2. (of compound leaves) having the leaflets growing opposite each other in pairs on either side of the stem
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Derived Formspinnately, adverbpinnation, noun

Word Origin

C18: from Latin pinnātus, from pinna feather
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for pinnate

adj.

1727, from Latin pinnatus "feathered, winged," from pinna "feather, wing" (see pin (n.)).

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Online Etymology Dictionary, © 2010 Douglas Harper

pinnate in Science

pinnate

[pĭnāt′]
  1. Having parts or divisions arranged on each side of a common axis in the manner of a feather. Ash, hickory, and walnut trees have pinnate leaves.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.